Optimal decentralized control of large scale systems  

作　　者：Xiao Qi SHI Daniel E. DAVISON Raymond KWONG Edward J. DAVISON 

机构地区：[1]Systems Control Group, Department of Electrical and Computer Engineering, University of Toronto, Ontario, Canada, MSS 3G4 [2]Department of Electrical and Computer Engineering, University of Waterloo, Ontario, Canada, N2L 3G1

出　　处：《Control Theory and Technology》2016年第4期287-313,共27页控制理论与技术（英文版）

摘　　要：This paper presents a new optimized decentralized controller design method for solving the tracking and disturbance rejection problems for large-scale linear time-invariant systems, using only low-order decentralized controllers. To illustrate the type of results which can be obtained using the new optimized decentralized control design method, the control of a large flexible space structure is studied and compared with the standard centralized LQR-observer controller. The order of the resultant decentralized controller is much smaller than that of the standard centralized LQR-observer controller. The proposed controller also has certain fail-safe properties and, in addition, it can be five orders of magnitude more robust than the standard LQR-observer controller based on their real stability radii. The new decentralized controller design method is applied to a large flexible space structure system with 5 inputs and 5 outputs and of order 24.This paper presents a new optimized decentralized controller design method for solving the tracking and disturbance rejection problems for large-scale linear time-invariant systems, using only low-order decentralized controllers. To illustrate the type of results which can be obtained using the new optimized decentralized control design method, the control of a large flexible space structure is studied and compared with the standard centralized LQR-observer controller. The order of the resultant decentralized controller is much smaller than that of the standard centralized LQR-observer controller. The proposed controller also has certain fail-safe properties and, in addition, it can be five orders of magnitude more robust than the standard LQR-observer controller based on their real stability radii. The new decentralized controller design method is applied to a large flexible space structure system with 5 inputs and 5 outputs and of order 24.

关 键 词：Decentralized control multivariable control PID control ROBUSTNESS OPTIMIZATION large-scale systems flexiblestructures 

分 类 号：TP[自动化与计算机技术]